2121761

Information

• Patent Grant
• 2121761

• References
• Source

• Patent Number

  2,121,761

• Date Filed

  Not available

• Date Issued

  Tuesday, June 21, 1938
  86 years ago

• CPC

  • H01J17/52 - with one cathode and one anode

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 174 - Electricity: conductors and insulators
  • 220 - Receptacles